-22.77% is the change from 997 to 770
Calculation steps:
[( 770 - 997 ) ÷ 997] x 100 = -22.77%
Formula
Percentage change = [(770 - 997) / 997] x 100
Subtract the new number by the original number
770 - 997 = -227
-227 ÷ 997 = -0.22768304914744233
-0.22768304914744233 x 100 = -22.77%